期刊论文

Research on the statistical modeling and simulation method for seafloor reverberation

Guo, X.-Y.(gxyl_1999@163.com)

中文

兵工学报

Binggong Xuebao/Acta Armamentarii

1000-1093

2009

30

7

940-944

10.3321/j.issn:1000-1093.2009.07.019

本校为其他机构

以海底混响作为研究对象,推导出统一形式的混响信号模型.为了克服该模型因计算每一个散射体作用结果而带来的计算复杂性,又提出了混响信号统计模型,然而统计模型的数值运算强度仍然可观.进一步应用简正波方法导出窄带混响信号模型,输入信号的窄带条件简化了关于频率的数值积分运算.对于窄带信号模型的分析表明:在输入高频窄带信号情况下,混响信号能够近似建模为输入信号与随机序列的离散卷积;混响信号的统计特性随散射体的分布情况变化而发生改变.最后,针对窄带混响信号模型设计了一种基于等间隔散射单元划分结构的仿真方法,仿真结果显示了方法的有效性.

Taking the seafloor reverberation as a studied object, an uniform model for calculating reverberation was deduced. In order to overcome the calculation complexity caused by calculating each of scatterers, a statistic model for reverberation was presented, which numerical calculation intensity is still considerable. A normal-mode model for calculating the reverberation excitated by the narrowband signal was got, in the narrowband approximation, numerical calculation of frequency became easy. The analyses of normal-mode model show that the reverberation excited by narrowband and high frequency s...